As a follow up to our general product development thread here:
http://www.f30post.com/forums/showthread.php?t=654924 We have been testing our catback for the F30 335 over the past week. We are playing with some different canisters to get the right amount of sporty sound with no droning or excessive noise. The exhaust will used full 3in piping front to rear ( the OEM pinches down to 2.5in in the front areas) with a dual outlet canister and 3.5in exhaust tips Once we add the catless downpipe, it'll add some more aggressive sound as well as a good bump in power im sure
Here are a few shots we took the other day once the weather cleared up a bit. We'll take some more shots of the exhaust once we have a more finalized version to show.
Video of cold start, to idle, reving, then a quick take off clip! Enjoy
Newest video:
Challenge Sport catback Exhaust with Challenge downpipe with High Flow Cat. The downpipe added a good amount of grunt down low and in the midrange without adding any additional noise at crusing speeds. The cold start is now a bit louder than before and the over all exhaust note is a bit deeper with a hint of turbo noise in it
When the Ecu is put in sport mode, you also get a bit more burble and poping noise off throttle